Hello,

We installed and configured Freeswitch on CentOS as per the steps provided in below link,

https://freeswitch.org/confluence/display/FREESWITCH/CentOS+7+and+RHEL+7#CentOS7andRHEL7-CentOS7andRHEL7-Stable

This is the status -

* Users are getting registered

* When User A calls User B, B gets a ringtone and is able to answer the call

* A sees that the call is connected but there is no audio for either A or B.

netstat output

---------------------

tcp        0      0 <SVR_IP>:5060        0.0.0.0:*               LISTEN      10503/freeswitch
tcp        0      0 <SVR_IP>:8081        0.0.0.0:*               LISTEN      10503/freeswitch
tcp        0      0 <SVR_IP>:8082        0.0.0.0:*               LISTEN      10503/freeswitch
tcp        0      0 0.0.0.0:8021         0.0.0.0:*               LISTEN      10503/freeswitch
tcp        0      0 <SVR_IP>:5080        0.0.0.0:*               LISTEN      10503/freeswitch

Log output

---------------

2020-10-21 08:32:12.323087 [NOTICE] switch_ivr_originate.c:3794 Channel [sofia/internal/1001@<SVR_IP>] has been answered
2020-10-21 08:32:12.323087 [DEBUG] switch_channel.c:3865 (sofia/internal/1001@<SVR_IP>) Callstate Change EARLY -> ACTIVE
2020-10-21 08:32:12.323087 [DEBUG] sofia.c:7326 Channel sofia/internal/1001@<SVR_IP> entering state [completed][200]
2020-10-21 08:32:12.323087 [DEBUG] switch_ivr_originate.c:3852 Originate Resulted in Success: [sofia/internal/1000@192.168.43.32:18486]
2020-10-21 08:32:12.323087 [DEBUG] switch_ivr_originate.c:3852 Originate Resulted in Success: [sofia/internal/1000@192.168.43.32:18486]
2020-10-21 08:32:12.323087 [DEBUG] switch_ivr_bridge.c:1793 (sofia/internal/1000@192.168.43.32:18486) State Change CS_CONSUME_MEDIA -> CS_EXCHANGE_MEDIA
2020-10-21 08:32:12.323087 [DEBUG] switch_core_state_machine.c:585 (sofia/internal/1000@192.168.43.32:18486) Running State Change CS_EXCHANGE_MEDIA (Cur 2 Tot 6)
2020-10-21 08:32:12.323087 [DEBUG] switch_core_state_machine.c:654 (sofia/internal/1000@192.168.43.32:18486) State EXCHANGE_MEDIA
2020-10-21 08:32:12.323087 [DEBUG] mod_sofia.c:656 SOFIA EXCHANGE_MEDIA
2020-10-21 08:32:12.723235 [DEBUG] sofia.c:7326 Channel sofia/internal/1001@<SVR_IP> entering state [ready][200]
2020-10-21 08:32:16.123236 [DEBUG] switch_rtp.c:2448 RTCP packet not written
2020-10-21 08:32:20.143147 [DEBUG] switch_rtp.c:2448 RTCP packet not written
2020-10-21 08:32:24.163187 [DEBUG] switch_rtp.c:2448 RTCP packet not written
This keeps repeating - "RTCP packet not written"

Please let us know what we might be doing wrong. Appreciate your help.

Regards,

Krishnan